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Finding the Fourth Proportional to 160.89, 221.97 and 121.53

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Solution

The fourth proportional to 160.89, 221.97 and 121.53 is: 167.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.89 : 221.97 = 121.53 : x
  2. Step 2: Convert to fraction form
    160.89/221.97 = 121.53/x
  3. Step 3: Cross multiply
    160.89x = 221.97 × 121.53
  4. Step 4: Simplify right side
    160.89x = 26,977.30
  5. Step 5: Solve for x
    x = 26,977.30/160.89
  6. Step 6: Final answer
    x = 167.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.